Classic American EQ.

AQ550b 4-Band Equalizer

Based on Classic American EQ from the late ’60s, the AQ550b is a continuation of the EQ that played a major role in the history of music recording, but with an additional filter band and several new frequencies. With a surprisingly wide range of tonal variations, the AQ550b is an invaluable and professional audio tool with great flexibility and excellent sonic ability.

Rather than offer a huge assortment of complex features, the AQ550b provides exactly the right number of controls. Its four EQ bands are overlapped significantly to aid in dual roles as problem solver and sweetening device with each band offering seven switchable filter frequencies that span four-to-five octaves. These frequencies, purposely selected to be musical rather than numeric.

Making use of Proportional Q intuitively widens the filter bandwidth at minimal settings and narrows it at higher settings without the need for additional bandwidth controls. This unique feature minimizes the «phase-shift» sound found in many equalizers.

The AQ550b extends the features of the original hardware and joins the flexibility of the digital world to the character of the analog processing. Allows you to choose between equalizer Modes (Stereo, Mid, Side) and remove Analogue Saturation from the processing circuit to deliver pure digital sound.

Latest Versions

MacOS:
AUv3 version 2.0.5 (Sep 19, 2022)
VST2 version 2.0.5 (Sep 19, 2022)
VST3 version 2.0.5 (Sep 19, 2022)

Windows:
VST2 version 2.0.3 (May 18, 2022)
VST3 version 1.0.3 (Sep 20, 2022)

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AQ560m

FEATURES
- Modeled vintage EQ;
- 4 bands of classic American equalization;
- Each band offers 7 selected frequency centers;
- 15 dB of boost/cut per band;
- EQ band 1 and 4 offer shelf/peak switching;
- Proportional Q narrows filter Q at extremes;
- Stereo, Mid or Side EQ modes.

KEYS
- Double click — reset to default value;
- Shift — reduce knob/fader sensitivity.


All Red Rock Sound products require a computer with appropriate DAW host software (none of which are included).

Plug-in Activation requires Internet connection!
You can go offline as soon as plug-in is successfully activated.

Versions from 1.0.0 and newer of the Red Rock Sound plug-ins have the following minimum requirements:

Mac OS X 10.13 or higher for AUv3
Mac OS X 10.12 or higher for VST
Windows 7 or higher (Windows XP not tested)
Mac: Intel Core i3 / i5 / i7 / Xeon / Full Apple silicon support (M1 or higher)
Windows: Intel Core i3 / i5 / i7 / Xeon / AMD Quad-Core or newer

In theory, any VST, VST3, AUv3 compatible host application should work. However, due to plug-in host differences between DAWs - and our own rigorous testing standards - we only officially test our plug-ins and instruments in the most recent versions of Logic Pro, Cubase, Ableton Live, Studio One, Reaper, and Bitwig. Red Rock Sound plugins are not tested in non-listed systems, but they most likely work as long as the system requirements are met. We cannot guarantee a solution for issues in unsupported systems.

VST2 (Win)
Version 2.0.3 (May 18, 2022):
- Minor bug fixes and improvements.

Version 2.0.2 (Apr 21, 2022):
- Implemented Direct3D9 GUI-rendering;
- Implemented software GUI-rendering;
- Minor bug fixes and improvements.

Version 2.0.1 (Feb 26, 2022):
- Fixed OpenGL1.x textures bug.

Version 2.0.0 (Feb 1, 2022):
- Implemented redesigned Toolbar;
- Implemented Undo/Redo functionality;
- Implemented A/B functionality;
- Implemented 2x/4x/8x-oversampling feature;
- Implemented resizable GUI;
- Implemented Saturation adjust knob;
- Bug fixes and improvements.

Version 1.0.3:

- Fixed cursor hide/restore bug;
- Fixed launch crash bug.

Version 1.0.2:
- Fixed cursor hide on Shift-key bug;
- Implemented widget aligned tooltips.

Version 1.0.0:
- First Release.

VST2 (Mac)
Version 2.0.5 (Sep 19, 2022):
- Fixed GUI crash bug on some systems.

Version 2.0.1 (May 19, 2022):
- Minor bug fixes and improvements.

Version 2.0.0 (Feb 1, 2022):
- Implemented redesigned Toolbar;
- Implemented Undo/Redo functionality;
- Implemented A/B functionality;
- Implemented 2x/4x/8x-oversampling feature;
- Implemented resizable GUI;
- Implemented Saturation adjust knob;
- Bug fixes and improvements.

Version 1.0.9:
- Fixed stepped params reset to zero bug.

Version 1.0.8:
- Fixed AUv3/VST2.4 DAW conflict;
- Fixed New Version activation issue.

Version 1.0.7:

- Implemented +1 decimal precision on Shift key for knob Tooltips;
- Moved plug-in stuff to the Music folder to avoid permission issues.

Version 1.0.6:
- Fixed launch crash bug.

Version 1.0.5:
- Fixed VST packaging issue.

Version 1.0.0:
- First Release.

VST3 (Win)
Version 1.0.3 (Sep 20, 2022):
- Fixed Bitwig plug-in "ReActivation" bug.

Version 1.0.2 (Jun 9, 2022):
- Fixed Editor (GUI) opening bug (Ableton, Cakewalk);
- Fixed "no sound" bug occurred in some DAWs.

Version 1.0.1 (May 18, 2022):
- Implemented Mono channel support;
- Implemented host Bypass;
- Minor bug fixes and improvements.

Version 1.0.0 (Apr 21, 2022):
- First Release.

VST3 (Mac)
Version 2.0.5 (Sep 19, 2022):
- Fixed GUI crash bug on some systems;
- Fixed Bitwig plug-in "ReActivation" bug.

Version 1.0.1 (Jun 15, 2022):
- Fixed "no sound" bug occurred in some DAWs.

Version 1.0.0 (May 19, 2022):
- First Release.

AUv3 (Mac)
Version 2.0.5 (Sep 19, 2022):
- Fixed GUI crash bug on some systems.

Version 2.0.4 (Jun 16, 2022):
- Fixed Editor (GUI) reopen redraw bug.

Version 2.0.3 (May 19, 2022):
- Implemented macOS 10.12 support;
- Minor bug fixes and improvements.

Version 2.0.2 (Mar 3, 2022):
- Fixed plug-in DAW restore state bug #2;
- Fixed macOS 10.13 plug-in validation issue.

Version 2.0.1 (Feb 4, 2022):
- Fixed plug-in DAW restore state bug #1.

Version 2.0.0 (Feb 1, 2022):
- Implemented redesigned Toolbar;
- Implemented Undo/Redo functionality;
- Implemented A/B functionality;
- Implemented 2x/4x/8x-oversampling feature;
- Implemented resizable GUI;
- Implemented Saturation adjust knob;
- Bug fixes and improvements.

Version 1.0.9:
- Fixed AUv3/Sandbox-mode operability bug.

Version 1.0.8:
- Fixed AUv3/VST2.4 DAW conflict;
- Fixed New Version activation issue.

Version 1.0.7:
- Implemented +1 decimal precision on Shift key for knob Tooltips;
- Moved plug-in stuff to the Music folder to avoid permission issues.

Version 1.0.6:
- Fixed launch crash bug.

Version 1.0.5:
- Fixed minor bugs.

Version 1.0.0:
- First Release.

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